1 //===----------------------------------------------------------------------===//
2 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
3 // See https://llvm.org/LICENSE.txt for license information.
4 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
5 //
6 //===----------------------------------------------------------------------===//
7
8 // UNSUPPORTED: c++03, c++11, c++14, c++17
9 // UNSUPPORTED: libcpp-has-no-incomplete-format
10 // TODO FMT Evaluate gcc-12 status
11 // UNSUPPORTED: gcc-12
12 // TODO FMT Investigate AppleClang ICE
13 // UNSUPPORTED: apple-clang-13
14
15 // Note this formatter shows additional information when tests are failing.
16 // This aids the development. Since other formatters fail in the same fashion
17 // they don't have this additional output.
18
19 // <format>
20
21 // template<class... Args>
22 // string format(format-string<Args...> fmt, const Args&... args);
23 // template<class... Args>
24 // wstring format(wformat-string<Args...> fmt, const Args&... args);
25
26 #include <format>
27 #include <cassert>
28 #include <vector>
29
30 #include "test_macros.h"
31 #include "format_tests.h"
32 #include "string_literal.h"
33
34 #ifndef TEST_HAS_NO_LOCALIZATION
35 # include <iostream>
36 # include <type_traits>
37 #endif
38
39 auto test = []<string_literal fmt, class CharT, class... Args>(std::basic_string_view<CharT> expected,
40 const Args&... args) constexpr {
41 std::basic_string<CharT> out = std::format(fmt.template sv<CharT>(), args...);
42 #ifndef TEST_HAS_NO_LOCALIZATION
43 if constexpr (std::same_as<CharT, char>)
44 if (out != expected)
45 std::cerr << "\nFormat string " << fmt.template sv<char>() << "\nExpected output " << expected
46 << "\nActual output " << out << '\n';
47 #endif
48 assert(out == expected);
49 };
50
51 auto test_exception = []<class CharT, class... Args>(std::string_view, std::basic_string_view<CharT>, const Args&...) {
52 // After P2216 most exceptions thrown by std::format become ill-formed.
53 // Therefore this tests does nothing.
54 // A basic ill-formed test is done in format.verify.cpp
55 // The exceptions are tested by other functions that don't use the basic-format-string as fmt argument.
56 };
57
main(int,char **)58 int main(int, char**) {
59 format_tests<char>(test, test_exception);
60
61 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
62 format_tests_char_to_wchar_t(test);
63 format_tests<wchar_t>(test, test_exception);
64 #endif
65
66 return 0;
67 }
68